CHEMICAL REACTION ENGINEERING QUIZ

Which one is the rate controlling step in a solid-gas non-catalytic reaction occurring at very high temperature?

Pore diffusion

Chemical reaction

Ash layer diffusion

Film diffusion

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The residence time distribution of an ideal CSTR is

1/τ exp (-t/τ)

Τ exp (-t/τ)

Exp(-t/τ)

1/τ (-t/τ)

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Molecularity of an elementary reaction, P + Q → R + S is

1

2

4

3

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The rate of reaction of a/an __________ reaction is not affected by temperature rise.

Autocatalytic

Zero order

Consecutive

Photochemical

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For a tubular flow reactor with uniform concentration and temperature, the independent variable is

Length

Diameter

Time

None of these

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Mean residence time is equal to the space time, when

All of these

The temperature, pressure and the density of reaction mixture remains constant throughout the reactor

The feed rate is measured at temperature and pressure in the reactor

There is no change in number of moles in gaseous reaction

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Non-catalytic fluid-solid reactions are represented by __________ model.

Both A and B

Neither A and B

Continuous reaction

Unreacted core

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Which of the following fixes the volume of a batch reactor for a particular conversion and production rate?

None of these

Rate constant

Operating conditions (e.g. pressure and temperature)

Density of mixture

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__________ catalytic reaction is involved in the thermal cracking of gas oil.

Homogeneous

Heterogeneous

Heterogeneous non

Homogeneous non

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An example of autothermal reactor operation is

Ethylene oxidation

Benzene oxidation

Sulphur dioxide oxidation

Ammonia synthesis

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